Fluid handling – Control by change of position or inertia of system
Patent
2000-01-14
2000-11-21
Rivell, John
Fluid handling
Control by change of position or inertia of system
70237, 137223, 152415, B60R 2500, F16K 3510
Patent
active
061488402
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a valve operating device comprising in a housing a valve operating member, which is movable in a compartment in the housing and at its underside has a generally cone-shaped recess, and an operating rod, which is in engagement with the recess with one end and with the other end is in contact with a valve actuating pin of a vehicle air valve, on which the device is mounted.
BACKGROUND OF THE INVENTION
Such a valve operating device has been shown and described in WO 96/24499. The purpose of the device is to accomplish a deflation of a vehicle on which the device is mounted, if the vehicle is moved, or in other words to function as a very effective theft prevention device for cars, motorcycles and other such vehicles.
When the vehicle is moved, the valve operating member is displaced, depressing the operating rod, which in turn depresses the valve actuating pin and opens the air valve.
In order to properly function as a theft prevention device, however, it has to be locked to the air valve. Only an authorized person with a key shall be able to remove the device for enabling a normal driving of the vehicle.
The object of the invention is accordingly to provide a locking mechanism for such a valve operating device, the locking mechanism being completely reliable and safe--but yet simple and cheap.
THE INVENTION
This is according to the invention attained in that a locking sleeve axially movable in the housing is arranged coaxially with the operating rod and is provided with means for attachment to the air valve and with means for engagement with a pivotable locking pin of a lock in the housing.
When the air valve of a vehicle, as is normally the case, is provided with an external thread, said attachment means is an internal thread in the locking sleeve.
Alternative attachment means are possible.
Preferably, the engagement means is simply a circumferential flange on the locking sleeve.
THE DRAWINGS
The invention shall be described in further detail below reference being made to the accompanying drawings, in which
FIG. 1 is a mainly sectional view through a valve operating device with a first embodiment of a locking mechanism according to the invention,
FIG. 2 is a section through a housing for a second embodiment of a valve operating device with a locking mechanism according to the invention,
FIGS. 3 and 4 are views from the left and from below of the housing according to FIG. 2, and
FIG. 5 is a section through the second embodiment of a valve operating device with a locking mechanism according to the invention.
DETAILED DESCRIPTION OF PRACTICAL EMBODIMENTS
A valve operating device as disclosed in WO 96/24499 is to be attached to an air valve of a tire of a car, a motorcycle or the like.
As appears in FIG. 1, it has a housing 1 for attachment to the air valve. The housing 1 has a cover 2 for forming a compartment, in which a disc-shaped valve operating member 3 is movable. At its underside the member 3 is provided with a generally cone-shaped central recess 3'. In engagement with the recess is an operating rod 4, which at its opposite or lower end is in contact with the valve actuating pin of the air valve, that is not shown in FIG. 1.
The compression spring in the air valve keeps the operating rod 4 in contact with the recess 3'. Unless any external force is applied to the operating member 3, the rod 4 will be kept centrally in the recess 3', and the air valve is closed. However, at a movement of the vehicle on which the device is mounted the operating member 3 is displaced, so that the operating rod is depressed, as is shown in FIG. 1. Hereby the valve actuating pin is depressed, letting the air out of the tire through the air valve.
In WO 96/24499 mention is made of a lateral or radial movement of the valve operating member. However, the operating member may also to a certain extent move axially, for example under acceleration. Hereby, the device will properly function to deflate a tire irrespective of the mounting angle of the device. With a proper
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patent: 4818029 (1989-04-01), Mourot et al.
patent: 5090223 (1992-02-01), Ruffler
Ashbourne Limited
Rivell John
Schoenfeld Meredith H
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